[Simh] How to keep RSTS in sync w/ "wall time"?

[Johnny Billquist]

This might be a stupid suggestion, but make sure the system isn't generated for 60hz and the line frequency set to 50hz.

  Johnny 


Paul Koning <paulkoning at comcast.net> skrev: (9 september 2016 18:47:42 CEST)
>
>> On Sep 9, 2016, at 12:02 PM, Dario Niedermann <dnied at tiscali.it>
>wrote:
>> 
>> Hello!
>> 
>> I'm on Linux/AMD64, using SimH 4.0-0b to emulate a PDP11/70. I
>disabled
>> CPU idling, and set throttling to 1360K. Based on info I found
>> don't remember where, this should probably give me a realistic 11/70
>> speed (if not, let me know).
>> 
>> The problem I'm having is that RSTS' (V04B-17) idea of a minute is
>quite
>> a long one: its watch is very slow and it lags behind. Same as when I
>> tried enabling CPU idling.
>> 
>> So, basically, I'm looking for tips on how to get a realistic 11/70
>> experience (speed-wise) while keeping RSTS in sync with my hardware
>> clock.
>
>I don't have a V4 system handy, but when I set throttling as you
>describe, my V10 system definitely does not correctly track time.
>
>I don't know if wall clock time tracking is supposed to work when
>throttling is set.
>
>On the other hand, when I don't throttle and set idling enabled, the
>system tracks time correctly.  I can't think of a reason why V4 would
>work differently.  You might post your config settings.
>
>	paul
>
>
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